These AC's are toxins secreted by pathogenic bacteria such as Bacillus anthracis and Bordetella pertussis during infection.

These agents are bacteria, viruses, or toxins, and may be in a naturally occurring or a human-modified form.

These blooms of organisms cause severe disruptions in fisheries of these waters as the toxins in these organism cause filter-feeding shellfish in affected waters to become poisonous for human consumption due to saxitoxin.

These preventative measures are a combination of systems and practices put into its place at legitimate bioscience laboratories to prevent the use of dangerous pathogens and toxins for malicious use, as well as by customs agents and agricultural and natural resource managers to prevent the spread of these biological agents in natural and managed.

These might be waste products or toxins, or signaling molecules like hormones or neurotransmitters during synaptic transmission.

These toxins are of importance to medical research.

These toxins include scopolamine and hyoscyamine which cause a bizarre delirium and hallucinations, and are also used as pharmaceutical anticholinergics.

These environmental bacteria may enter the muscle through a wound and subsequently proliferate in necrotic tissue and secrete powerful toxins.

These toxins destroy nearby tissue, generating gas at the same time.

These toxins are thought to operate by opening sodium channels.

These toxins are probably a deterrent to parasites and may also serve to dissuade predators from taking the birds.

These toxins are undefined and have no scientific basis, making the validity of such techniques questionable.

These striking but slow-moving frogs secrete powerful toxins from glands on their backs and use their color to advertise their toxic composition to potential predators

These toxins have been found to damage the mitochondria and produce a large scale immune response.

These " toxins " allow the further spread of bacteria and, as a consequence, deeper tissue infections.

These molecules, however, are enzymes that are secreted by a variety of organisms and are not usually considered toxins.

These toxins can enter the blood stream and lymphatic system, they inhibit protein synthesis, damage macrophage systems, inhibit particle clearance of the lung, and increase sensitivity to bacterial endotoxin.

These toxins show various cytotoxic activities in the serum, have different molecular weights and some of them are bound to other proteins, primarily to albumin.

These toxins include ciguatoxin, maitotoxin, scaritoxin and palytoxin.

These toxins, when inhaled, can require hospitalization for both acute and chronic exposures.

These toxins are encoded by SAg genes that were incorporated into the mouse genome from the mouse mammary tumour virus ( MMTV ).

These toxins share the ability to bind to the major histocompatibility complex proteins of their hosts.

These toxins prevent cholinergic transmission and could well prove a lead for the development of novel anticholinergic drugs.

These carbohydrate head groups also act as specific receptors for certain pituitary glycoprotein hormones and certain bacterial protein toxins such as cholera toxin.

These localities continue to yield new organisms faster than they can be studied.

These organisms are associated with certain predisposing conditions:

These are sites of exceptional preservation, where ' soft ' parts of organisms are preserved as well as their more resistant shells.

These hypothetical forms of life range from simple bacteria-like organisms to beings far more complex than humans.

These are then taken up by organisms in the soil, react with mineral soil, or are transported beyond the confines of the ecosystem ( and are considered " lost " to it ).

These cells and the bacteria trapped inside them entered a symbiotic relationship, a close association between different types of organisms over an extended time.

These modern organisms with endosymbiotic relationships with aerobic bacteria have verified the endosymbiotic theory, which explains the origin of mitochondria and chloroplasts from bacteria.

These plant communities cover approximately 9. 4 percent of the Earth's surface ( or 30 percent of total land area ), though they once covered much more ( about 50 percent of total land area ), in many different regions and function as habitats for organisms, hydrologic flow modulators, and soil conservers, constituting one of the most important aspects of the biosphere.

These organisms may help to show:

These organisms are now used for several purposes, and are particularly important in producing large amounts of pure human proteins for use in medicine.

These ( and other ) critics have questioned how natural selection operating on individual organisms can lead to the evolution of planetary-scale homeostasis.

These organisms secrete shells made of aragonite or calcite, and leave these shells behind after the organisms die.

These microorganisms including bacteria and the broad range of organisms that form the marine microbial loop, responsible for regulating much of the oceans ' biogeochemistry.

These processes allow organisms to grow and reproduce, maintain their structures, and respond to their environments.

These organisms are also common in soil and play a vital role in ammonia oxidation.

These pathways occur within all living organisms in some form:

These nutrients are typically found in edible plants, especially colorful fruits and vegetables, but also other organisms including seafood, algae, and fungi.

These proteins are crucial for cellular motility of single celled organisms and the sperm of many multicellular organisms which reproduce sexually.

These are sophisticated ways of reducing the variation displayed by organisms to a manageable level.

These small particles or organisms gain entry when the shell valves are open for feeding or respiration.

These function, typically in higher organisms, as hormones and signaling molecules.

These base pairs have a higher thermal stability ( melting point, see also DNA-DNA hybridization ) than adenine-thymine, a property that might convey, among organisms living in high-temperature environments, a selective advantage on variants enriched in GC content.